Why, I've even known sub-robots who've fallen in love like us." "I know, darling, we'll just have to be patient until RCR goes through. Try to remember how difficult it is for the human mind to comprehend our love, even with the aid of mathematics. As rationaloids we fully understand the basic attraction which they call magnetic theory. All humans know is that if the robot sexes are mixed a loss of efficiency results. It's only normal—and temporary like human love—but how can we explain it to them? Robots are expected to be efficient at all times. That's the reason for robot non-fraternization, no mailing privileges and all those other laws." "I know, darling, I try to be patient. Oh, Frank, the main thing is we're together again!" The big servo checked the chronometer that was sunk into his left wrist and a couple of wrinkles creased across his neoprene forehead. "Elizabeth," he said, "I'm due on Hidalgo in 36 hours. If I'm late the mining engineer might suspect. In twenty minutes I'll have to start dis—" "Don't say it, darling. We'll have a beautiful twenty minutes." After a while the girl mech turned away for a second and Frank Nineteen reached over softly and cut her power. While he was dismantling her, Min and I tiptoed back to the Renting Office. Half an hour later the big servo came in, picked up his refuel receipt, said good-bye politely and left through the inner airlock. "Now I've seen everything," I said to Min as we watched the Minor Planets rocket cut loose. "A couple of plastic lovebirds." But the little woman was looking at it strictly from the business angle. "Bill," she said, with that look on her face, "we're running a respectable place out here in space. You know the rules. Spatial Housing could revoke our orbit license for something like this." "But, Min," I said, "they're only a couple of robots." "I don't care. The rules still say that only married guests can occupy the same cabin and 'guests' can be human or otherwise, can't they? Think of our reputation! And don't forget that non-fraternization law we heard them talking about." I was beginning to get the point. "Couldn't we just toss the girl's parts into space?"